ABSTRACT
Physics Shock waves focused at a point produce a rapid increase in pressure with subsequent steep fall to below normal pressure at the focal point. There is then recovery to the baseline normal pressure at a relatively slower rate. This results in erosion at the entry and exit portions of the calculus due to cavitation and shearing forces are created within the stone which cause it to shatter. A portion of the shock wave is reflected backwards resulting in further shearing forces and shattering.
